Discover: Jeremy Grantham is a fascinating dude. He is a highly successful capitalist who blames capitalism for killing the planet. If you`re familiar with this "connoisseur of [market] bubbles," as the New York Times referred to him in a profile, it`s probably due to his increasingly Malthusian outlook. In 2011, he warned that "accelerated demand" from developing countries was depleting the earth`s natural resources. He declared that we "now live in a different, more constrained, world in which prices of...